Heating and melting furnace.



W. N. BEST.

HEATING AND MELTING FURNACE.

APPLICATION FILED JUNE24, 1914.

1,1 19,227, Patented Dec. 1,1914

2 SHEETS-SHEET 1 INVEN TOR WITNESSES 2' Z i g 5 1 5- $0M 40). Z W V 7l/1 1 0.1 I Q W ITWMEY W. N. BEST. HEATING ANI MELTIHG FURNACE. nruounonnun 10111124, 1914.

1 ,1 1 9,227. Patented Dec.1.191'.

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IlWfN TOR A TTORNEY zont'al plane as the tion chamber. 7

Beneath theeombustion chamber, there are a plurality of exhaust gasoutlets forming the ends of lines 20 extending substantiallyhorizontally to a transverse fine 21. These fiues 20 may be ofanydesired numher, but are ofsuiiicient capacity to permit the freee'afl pe=-of1 the gases of combustion from theheatmg chamber. The flue21 lies beneath the narrower portion of the combustion chamber and fromone or both ends thereof a rtical flue 22 extends upwardly to the top of'the furnace. These extend\ along opposite sides of the combustionchamber; and may be united by a transverse conduit 23* above thecombustion chamber anddchvcr to a single stack 23. This transverseconduit is preferablyspaced above the top wall so that air may enterthere-beneath and prevent the lip-draft in the stack-from sucking gasout of the heating chamber.

For heating the v furnace, I preferably provide a burner 240i ischaracter designed for delivering a zw oomparatively flat fanshapedsheet -of-vaporized or atomized fuel from the apex ofthewtriangulargombustion chamber. towardithe base, thereof. The fanshaped sheet isfipreferably secured by the bottom of the combususe. ofcustomizing fluid such for instance as compressed airor' steam. Burnerssuitable for, the purpuse iarcshown in my prior patentsi708,453:and7525.95. Below the burner oratomizing nozzle; I. provide a separateconduit 25' for delivering combustion-supporting air, preferably underpressure; The

volume of air delivered may becontrolled in accordance with thetemperature desired and to secure an'oxidizing-or reducing flame.

A smaller volume of air is sufiicient if cone pressed air be used as'theatomizing fluid rather than steam. 1

In using my improved furnace, the aricles tobe heated or the cruciblesor other containersffor metals oralloys to be melted, are placed'on thefloor-of the heating chamber and the. proper supply of fuel and airdelivered at the inlet to the combustion chamber. Substantially theentire combustion chamber will be filled with a sheet of flame which isdelivered to the upper portion'of the heating chamber. By reason of theparticular shape and formation of the heating chamber, the flame andgases will be brought down directly on to the articles'rto be heated andwill sweep across the upper portion and then back along the lowerportion toward the lines 29. T e fiues 20 being arranged uniformlyacross the Wall of the heating chamber beneath the combustion chamber,tend to withdraw equal portions of gas along the entire length of theheating chamber. It will be noted that the combustion chamber delivers aslightly great/er ug ra iation.

and aids materially in the production of the uniform temperature in Aall parts of the chamber. -Theplacing of exhaust flues as described, notonly causes the gas to prop erly flew back across the base'or floor ofthe chamber, but the heated gas in passing through the fines heats upthe walls,not only below, but at. the sides of the combustion chamber,so as to conserve the-heat produced in'combustion chamber by the-directburnof the fuelantl reduce the losses due to Ti: is of courseevidentthat the size, and

proportions of the heating chamber may be varied somewhat in. accordancewith-the character of the material to be heated. In case the furnaceisemployed'forjannealin 1 preferably insert a checkerworkof bri 26 orother suitable-:material between the combustion chamber and the heatingcharm her so as to conserve the heat and to revel;

the flames from'playin directly on t eartielse to be annealed. ne formof checker work which may be employed forthepurpose is illustrated inFigs; 5 and 6, where bricks are arranged so' as to leave a large numberof=comparative1ysmall passages for thehotgases, M

Having thus described my invention, what 1 claim as new and desireto-protect by Letters Patent, is

1. A furnace having a heatin chamber provided with a. fioor, an end door and a roof substantially higher along, onefside than along theopposite side,-'a laterally lien 'ing, combustion-chamber having anopeii' flame delivering side-extending along s'uh stan'tially the entirelength of thefirs't men-Q tibncd side of said heating chamber adjacent vto said roof, :7. series of substantially-horizontal iiues havingtheir-inlet ends co nmunicating with said heating chamber at spacedpoints along said first mentioned side of the latter above the bottomand directly below the-flamedelivering side of said combustion chamber,anda transverse flue below said combustion chamber-and communicatingwith the deliverin ends of said first mentioned lines and having anoutlet at each end thereof.

roof, a laterally flaring combustion chamher having an open flamedelivering side ex tending alon substantially the entire length of oneside 0 said heating chamber adjacent to said roof, and a series ofsubstantially horizontal outlet flues beneath said combustion chamberand leading from-"said heating chamber at s aced points along side ofthe latter and above the bottom uni directly below the flame deliveringside ofsaid combustion chamber.

3. A furnace including a heating chamber, V

jet beneath said vapor jet ada ted to deliver a blast of air insubstantia y the same direction as said vapor jet, said heating chamberhaving a plurality of exhaust-gas outlets arranged along the side wallthereof adjacent to the open end of said combustion chamber and beneaththe latter and above the floor, and a reticulated partition between saidcombustion chamber and said heating chamber and abovesaid exhaust-gasoutlets. S ed at New York city'in the county of New i 'ork and State ofNew York this 22nd day of June A. D. 1914.

WILLIAM N. BEST.

Witnesses:

FLORENCE Lav na;

